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Ambient vibration measurements on a Suspension Bridge Model Updating
eering & StructuralDynam-ics. 2O00: 29 (7)} 927m9447 FAN Li-chu. Failure million city. Zhang Qiwei. Suspension bridge based on sensitivity analysis of dynamic finite element model updating. Civil Engineering t2000; 33 (1) :9-148 sash should Gui. Zhou shoes dust,Tory Burch shoes, Wang Zhihua. Revised suspension with dynamic neural network model. Vibration Engineering. 2000; 13 (1) :46-528 Hu Jinming. Should Huaiqiao. Shen loose. Damping with the power spectrum and frequency of seeking the exact methods,Abercrombie Fitch uk, see: Should Huaiqiao editor. Vibration and noise of modern technology,abercrombie outlet, Volume 2. Beijing: Aviation Industry Press, 2000,949910 BermanA,Abercrombie and Fitch, NagyEJ. Improvementofalargeanalyticalmodelusingtestdata. AIAAJournal, 1983l21 ( ! Ll68 - 1l73ModelUpdatingofaSuspensionBridgeUsingAmbientV * brat * onMeasurementsZhang0iwei (DepartmentofBridgeEngineeringtTongj * UniversityShanghai, 200092) AbstractThispaperpresentstheimplementationofthefiniteelement (FE) modelupdatingforanewlyconstructedlongspanupensionbridgeusingambientvibrationmeasurements. A3-dimensionalFEmodelisfirstestablishedforthebridgebasedondesigndr ~, wingsandthedynamiccharacteristicsarethenanalyzed. Ambient ~ ibrationmeasuringisalsoconductedtoobtait ~ thedynamiccharacteristicsofthebridgewhichBreusedtoupdatetheFEmodelmodification. Theupdatingmethodusedisaneigenvaluesen ~ itiv / ty-basedapproachwithparametricconstraints. Basedonaneigenvaluesensitivitystudy, asetofstructuralparametersi *. qelectedforadIustmentThentheFEmodelisupdatedinaniterafivefashionso8sthedifferencee-tweentheanalyzedandthemeasurednaturalfrequenciesarereduced. ThefinalupdatedFEmodelforthesuspensionbridgeisabletoproducenaturalfrequenciesclosertothemeasuredones. Completeeliminationofthefrequencydifferenceshoweverseen1. ~ Notlikelyandthecaus ~ irieflydiscussed. Keywords {modelupdating; dynamiccharacter】 tic} suspensionbridge; FEM; ambientvibration of male Zhang Qiwei, PhD. Strong wine professor. November 1966 Health Phone: (021) 65983427; E-mail: zhangqw @ tongji. edu. cn
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